Chapter 3 Deployment
Manual VIPA System SLIO
3-8
HB300E - IM - RE_053-1DP00 - Rev. 11/03
For the deployment of the DP-V1 services you have to take care that your
master system supports DP-V1 communication. More detailed information
about this may be found in the description of your master system. There
are the following handling blocks available for CPUs, programmable with
Siemens STEP7, like SPEED7 CPUs from VIPA:
SFB 52
Read record set from a DP slave
SFB 53
Write record set to a DP slave
SFB 54
Receive interrupt from a DP slave
In the following the services for the acyclic data transfer that are using that
function blocks are shown.
More detailed information about the services and the DP-V0/V1 communi-
cation may be found in the PROFIBUS norm IEC 61158.
Acyclic data communication between DPM 1 and slaves
Read
The master reads a record set from the slave.
Write
The master writes a record set to the slave.
Alarm
An alarm is transmitted from the slave to the
master, which explicitly acknowledges receipt. The
slave can only send a new alarm message after it
has received this acknowledgment; this prevents
any alarms being overwritten.
Alarm_
Acknowledge
The master acknowledges receipt of an alarm to
the slave.
Status
A status message is transmitted from the slave to
the master. There is no acknowledgment.
Data transmission is connection-oriented over a MS1 connection.
This is set up by the DPM 1 and is closely linked to the connection for
cyclic data communication. It can be used by the master that has
parameterized and configured the respective slave.
Services for acyclic data communication between DPM 2 and slaves
Initiate / Abort
Setup and termination of a connection for acyclic
data communication between DPM 2 and slave.
Read
The master reads a record set from the slave.
Write
The master writes a record set to the slave.
Data_Transport The master can write application-specific data
(specified in profiles) a cyclically to the slave and if
required, read data from the slave in the same
cycle.
Data transmission is connection-oriented over a MS2 connection.
This is set up before the start of the acyclic data communication by
the DPM 2 using the Initiate service. The connection is then available
for Read, Write and Data_Transport services. The connection is
terminated correspondingly. A slave can maintain several active MS2
connections simultaneously. A limitation is given by the resources
available in the slave.
Services
acyclic data
communication
DPM 1
(Master class 1)
DPM 2
(Master class 2)